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y in (-oo:+oo)
8*(y+9/2)+8*(3*y-(7/8)) = 0
8*(y+9/2)+8*(3*y-7/8) = 0
8*(y+9/2)+8*(3*y-7/8) = 0
32*y+29 = 0
32*y+29 = 0
32*y+29 = 0 // - 29
32*y = -29 // : 32
y = -29/32
y = -29/32
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